Self-adjusting anti-sparrow-rest



T B.DO UGH'E'RTY.

; Self-Adjusting Anti-Sparrow Rest. No. 224,520.

Patented Feb. 17, 1880. FIGI. 7

UNITED STATES PATENT. OFFICE.

TIBERIUS B. DoU'eHERrY, or PHILADELPHIA, PENNSYLVANIA.

SELF-ADJUSTING ANTl-SPARROW- REST.

SPECIFICATION forming part of Letters Patent No. 224,520, dated February 1'7, 1880.

I Application filed November 14, 1879.

To all whom it mot/yconcern:

Be it known that 1,T1:BERIUs B. DOUGH- ERTY, of 2321 Pine treet, in the county of Philadelphia and State of Pennsylvania, have 'the prongs thrown down. are modifications, with a weight-to throw up invented a new and useful Improvement in Self-Adjusting Anti-Sparrow-Rests, which improvement is fully set forth in the following specification and accompanying drawings.

This invention relates to certain constructions for the purpose of making a self-adjusting anti-sparrow-rest.

These little birds having been introduced into cities of America, it is found that'they dam age the appearance of houses by alighting on the tops of shutters and the turn-buckles which hold the same; and the object of this invention is to provide a self-adjusting set of prongs which shall be raised upon the windowshutters when opened and closed down when the shutter closes, all of which is hereinafter more fully set forth.

' Figure 1 represents a plain house-shutter provided with my attachments or prongs upon the top--one shutter open and the other closed. Fig. 2 is a section of the top of the shutter. Fig. 3 is a part elevation of the shutter, show. ing the spring and hinge of the set of prongs. Fig. 4. shows, in section, the shutter closed and Figs. 5, 6, 7, and S the prongs. Fig. 9 is a modification, wherein a cap is provided at the end of the shutter, in

. which there is provided a spiral spring. Fig.

10 represents a turn-buckle provided with prongs, such as would be made when manufacturing them to embrace this improvement. Fig. 11 represents aturn-buckle provided with a self-adjusting addition to the same.

In all the same letters refer to the same parts.

On the top of the shutter A are provided the ornamental prongs B. These are held in place by a suitable hinge-construction, and are made to descend or lie down, as in'Fig. 4., by being brought against the window-lintel in closing the. shutters, and upon opening the same the spring D, or equivalent weight IE, will immediately throw them up into their original position.

To enable those skilled in the art to make and use this invention, I will proceed to deshown in Figs. 5, 6, 7, 8, and 9-a rod having points set therein.

By reference to Fig. 3 there will be seen a small casting, G, screwed to the top of the shutter, and at the bottom of the groove F,

and around this casting are bent the two butts b of the prongs B, forming a hinge.

In the construction Figs. 5, 6, 7, and 8 the rod isweighted at the end, and this weighted prong, coming in contact with the lintel G of the window, causes it to take the position shown in Fig. 6. In the construction Fig. 9 the end of the rod is provided with the small cross-head H and spring h. The opposite end of the cross-head, h, is bent slightly, so as to gage the exact position at which the prongs should stand.

In the construction Fig. 10 a simple turnbuckle is provided witli prongs I. These are fixed upon the arm of the turn-buckle, which extends out of the wall.

In the construction Fig. 11 there is provided a swinging arm, K, which is forced into the desired position by the spring L, said spring L being secured from the weather by the thimble-top Z. This construction isad justable, and capable of being attached by the little prongs m to any existing turn-buckle.

Havingthus shown and described the construction and operation of my invention, thereby demonstrating the fact that it is impossible 'for'any building provided with the same to be defaced by the alighting of sparrows or other birds on shutters, turn-buckles, or any part so protected, what 'I claim, and desire to secure by Letters Patent of the United States, is-

1. An anti-sparrow-rest consisting of a series of spikes, serrated plates, or prongs connected to a window-blind, shutter, door, or other similar structure, and capable of closing down from a vertical position, substantially as and for the purpose set forth.

2. A window-blind, shutter, door, or other similar structure provided at its top with a S6- itself-adjusting anti-sparrow-rest, substantially as and for the purpose specified.

In evidence that I claim the foregoing as w my invention I afiix my signature and seal, in the presence of two witnesses, this 5th day of November, 1879.

TIDE-MUS B. DOUGHERTY.

Witnesses:

WIzLrAM J. GILLIN, JAMES F. MAY, Jr. 

